*2107-140 PTFE SPIRAL B/U FDA

This back-up ring is supplied in AS568-140 white PTFE (Teflon) 55 Shore D with an inside diameter of 2.237 in (56.82 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.443 in (62.05 mm), catalogued under part number TSP140. It bridges the extrusion gap so the primary seal holds its shape under load.

The material holds up against oxidizing media, steam, and nearly all industrial chemicals. PTFE (Teflon) is valued for a very wide continuous service temperature range and one of the lowest coefficients of friction of any solid. Service temperature is rated from -65°F (-53.9°C) through 500°F (260°C). Applications involving service requiring elastic recovery or molten alkali metals call for a different compound.

You will find this material specified across pharmaceutical and biotech, food and beverage, and aggressive-media pipelines.

Stocked as TSP140 and sold individually. Review your operating media and conditions against this specification before installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.